| Gourock to Ilawa | 979.95 mi (1,577.07 km) |
| Gourock to Imielin | 1,069.45 mi (1,721.11 km) |
| Gourock to Inowroclaw | 949.32 mi (1,527.78 km) |
| Gourock to Janow Lubelski | 1,171.54 mi (1,885.41 km) |
| Gourock to Jarocin | 943.35 mi (1,518.18 km) |
| Gourock to Jaroslaw | 1,205.37 mi (1,939.86 km) |
| Gourock to Jasien | 925.25 mi (1,489.05 km) |
| Gourock to Jaslo | 1,168.89 mi (1,881.14 km) |
| Gourock to Jastrzebie-Zdroj | 1,052.20 mi (1,693.36 km) |
| Gourock to Jawor | 923.30 mi (1,485.91 km) |
| Gourock to Jaworzno | 1,068.92 mi (1,720.26 km) |
| Gourock to Jedrzejow | 1,093.20 mi (1,759.34 km) |
| Gourock to Jelcz-Laskowice | 966.75 mi (1,555.83 km) |
| Gourock to Jelenia Gora | 910.85 mi (1,465.87 km) |
| Gourock to Jozefoslaw | 1,075.95 mi (1,731.58 km) |
